Potassium Sulfite Formula

Potassium Sulfite is a non-flammable white soluble compound. It is commonly used as a food preservative (E225). Let us learn about the chemical formula and various other details of Potassium Sulfite.

Properties Of Potassium Sulfite

Chemical formula K2O3S
Molecular weight 158.254 g/mol
Chemical names Dipotassium sulfite

Potassium sulphite

Sulfurous acid, dipotassium salt

Solubility in water Soluble
Acidity (pKa) 8

Potassium Sulfite Structural Formula

The structural formula of Potassium Sulfite is as shown in the figure below.

Potassium Sulfite Structural Formula

 

The potassium sulfite is formed by the decomposition of potassium metabisulfite at 190°C.

K2S2O5 → K2SO3 + SO2

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